The appearance of colour is based on different parameters and observation conditions. Taking into account that the research of certain visual psychophysical effects is updated daily, such a phenomenon presents a challenge for researchers of modern visual communication systems. Effects of psychophysical expansion and simultaneous contrast belong to this group. This paper researches the influence of those effects using method of visual tuning. Those effects cause the shifting of colour appearance of stimuli (different combinations of primary and secondary colours) on test samples. Test samples are based on White’s illusions (groundal dotted illusion and figural dotted illusion).